The command is 'killparticles' and it disables all particle effects in game including smoke pots and fire pots, it is quite bullshit since it just completely invalidates smoke pots but you also end up walking straight into fire cause you can't see it, and obviously it only applies for your client and as far as I know there isn't a way to turn particles back on.

After I altered some things there, I tried joining a public server, but I got the message something like "console commands were used, the game must be restarted" After that, inside a game, said commands didn't have any effect